Pyrotechnic device



Jan.V 29, 1929.

H. TOMIZAWA PYROTECHNIC DEVI CE Filed July 29, 1927 vwefntoz HARUKICHI TOMIZAWA @513W Guo/:mw

-This -invention relates in general to pyrol 1 technic Idevices,and, more particularly, to a harmless combined sparkler and explosive.

.According to the invention, apyrotechnic device is provided which may consist esseny,when ignited, will emita profusion of harmless sparks, similar to the usual sparkler used yfor amusement and other purposes.- The mbody may also have incorporated therein a v substance which,preferably after the sparkler material has burned itself out, will explode panied by a quite loud report. v lThe device according to the invention, may

be madev up of a shell or tube of combustible material, such aspaper, the paper preferably beinginitially yin the form of a long strip which is rolled into a helix to .form a tube havingclosed ends. The upper end of the tube may be adapted to be lighted by a. match, andthe tube may hold, for a comparatively large part of its length, the usual sparkler Acompound which maybe in the for-m of a powder. The lower end of the tube may be tightly twisted to form a more or less lsolid paper handle. Preferably at the lower end of the sparkler powder and near the han- `idle explosivepowder may be provided to ,30y give the mild and harmless explosion and report. The paper maybe appropriately colored, and the handle may have a distinct coloration so that the proper end will be lighted. Among the features of the invention is the provision of a harmless pyrotechnic device y which will give the consecutive effects of a Y gsparkler and explosive. Furthermore, the

yprovision. of a combustible body or support fo'rfthe sparkler and explosive mL terial elimi- 40 nates the dangers due to the relatively heavy non-combustible rod found in the usual sparkler.

Various other features and advantages of Y' the invention will be apparent from the following particular description and from an inspection of the accompanying drawings.

The invention also consists in certain new and original features of construction and combinations of parts hereinafter set forth and claimed.

. Although the novel featureswhich are believed to be characteristic of this invention will be particularly pointed out in the claims appendedv hereto', the invention itself, as to fsa vits objects and advantages, the mode of its i .tially of a body made of a material which,

4 Y `giving ya harmless and mild explosion accom- .In the following description and 1n the HARUKICH'I TOMIZAWA, or TOKYO-EUKA, .'rArAN,` AssreNon rro ALFRED HAGUE AND y COMPANY, INC., or NEW YORK, N. Y., A CORPORATION or NEW YORK.

PYROTECHNIAC DEVICE.

Application :tiled July 29, 1927. Serial No. 209,226.

operation and the manner of its organization may be better understood by referring to the following description taken inconnection with the accompanying drawings forming a part thereof, in which Fig. l, lis an enlarged section in elevation of the device according to the invention, the middle part beingv 'broken vaway and parts exaggerated to better illustrate the unique construction; and

Fig. 2, is an outside elevation of the device.

Fig. 3, is a section on the line 3 3 of Fig. 1.

Fig. 4, is a section on the line 4.--4 of Fig. l.

claims parts will be identified by specific names for convenience, but they are intended to be as generic in their application to simi- `lar parts as the art will permit.

y Like reference characters denote like parts in the several figures of the drawings.

Referring now to the drawing, the device, as lillustrated, comprises a body of paper, the body being made from a straight strip l, of relatively light tissue paper rolled into a helix in the manner shown. The upper part of the body may be made in the form of-a hollow tube 2. The lower part of the ,body may be tightly twisted to form a more or less solid paper rod to act as a handle 3' for the device. rlhe papery strip l is wound helically with the adjoining convolutions overlapping to provide the necessary strength and to make a powder tight tube. The paper strip may be suitably folded and then twisted in a helix at the upper end to effectively close the top of the tube 2 to prevent loss of the contents, this being shown in Fig. 3.

If desired, the paper may be suitably decorated to have an attractive appearance.

The paperstripmay be provided with a colored edge extending thel length of the paper strip so that a helical colored line will be formed when the paper is twisted to form the body. vThe handle' 3 of the body may be colored with adistinctive color so that it will be easily recognized to insure the proper ond being lighted.

Throughout the major extent of the hollow tube 2, a suitable sparkler powder l may be placed. This sparkler powder may be any of the powders normally used to give the usual sparkler effect. of the burning sparkler material is well known, the material causing a profusion of harmless sparks shooting in all directions The luminous effect giving a luminous and powder 5 maybe placed so that, after the sparkle powder is burned out, the explosive powder will be ignited. This explosive powder is of such a nature that it will burn very quickly, giving a mild explosion and causing a fairly loud report.

To use the sparkler, the handle 3 will be held in the hand and the upper end ignited by a'suitable source of fire. The sparkler powder will immediately ,begin to burn pro-v viding its characteristic eiect, the paper tube burning along withl the sparkler powder. V'Vhen the sparkler powder burns downto the explosive powder, a mild and harmless explosion causing a sharp report, occurs. In some cases, it may be preferable to hold the device with the handle end up during the burning thereof.

The device is harmless, the sparkler composition giving off non-burning sparks and the paper burning completely and leaving an ash which does not hold-heat. There is no core of non-combustible material to get hot and burn the careless users, which are mostly children, during and after burning of the device. The explosion is mild, and merelyenough to give a sharp crack or report, and not enough to cause even a'slight injury. The device is absolutely safe and, by the combination of' the sparkler and lirecracker effect, makes a very attractive and pleasing amusement device. v

The burning of the sparkler powder gives l the usualfpleasing effect and the culmination of the sparkler eect with a mild explosion is unique and unusual and adds'greatly to the attractiveness ofthe device from an amusement standpoint. Furthermore, due to the construction and use of harmless materials, there is nothingto harm the careless user'. Also due to the great simplicity and efficiency of construction, the device may be made quite inexpensively and yet to give uniform satisfaction.

Although certain novel features of the invcntion have been shown and described `and are pointed outin the annexed claims, it will be understood that various omissions, substitutions and changes inthe several steps vention.

form and details of the apparatus illustrated may be made by those skilled in the art without departing from the spirit of the in- VVhat is claimed is:

l. A pyro-technic amusement device comprising a body made up of a strip of thin paper Wound helically to form anl upper hollow tube and also to form a substantially tight lower handle, a small amount of explosive powder in the lower part of said tube, a

relatively large amount of sparkler powder y extendingfrom the upper end of said tubeto said explosive powder, the upper end of said tube being suitably closed to prevent escape of said sparkler powder, said paper and sparkler powder burning together completely and gradually down to said explosive powder emitting a shower of harmless sparks as they burn and leaving a quick-cooling-harmless ash. y l 2. A pyro-technic device comprising a rodlike body, sparkler material 1incorporated with said body at the upper ortion and extending a substantial part oi) the ylength of said body, a relatively smallk amount of explosive vmaterialv below and adjoining said sparkler material and also incorporated with said body, the lower end of said body forming a handle,saidxupper portion burningv completely and gra-dually down to said explosive material, emitting a shower ofharmless sparks as it burns and leavinga harmy less residue.

3. A harmless combined sparkler and explosive comprising a tube of combustible material which will leave a quick cooling ash, sparkler material and pyro-technic material disposed within said tube, said tube and sparkler material burning together and gradually, emitting a profusion of harmlessk sparks as they burn.

4. A sparkler comprising a tube of combustible material which will leave a quickcooling ,harmless ash, sparkler material within said tube, said tube and sparkler material burning together and gradually, emittinga profusion of harmless sparks as they burn.

In testimony whereof I have hereunto set my hand and seal.

' his HARUKICHI X TOMIZAWA. [L. 8.]

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